Brake arrangement for six-wheel trucks.



Patented July Y3, 1917.

3 SHEETS-SHEET I.

.Il @a J. C. WHITRIDGE & G. T. JOHNSON. BRAKE ARRANGEMENT FOR SIX WHEEL TRUCKS.

' APPucATloN man Amzl, 191e. 1,232,142.

J. C. WHITRIDGE & G. T. JOHNSON.

BRAKE ARRANGEMEN FOR s|x WHEEL TRUCKS.

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,wl e hm D3 A l m J APPLICATION FILED APR. 21,1916.

I. C. WHITRIDGE & G. T. JOHNSON.

BRAKE ARRANGEMENT FOR SIX WHEEL TRUCKS'.

APPLICATION FILED APR. 2l. I9I6- Patented 3 3 SHEETS-SHEET 3."

, VI/ENTORS 4.. @qt

/lomeys LVTAUSSES JOHN' C. Wmfrninee AND enonenr. JOniNsON, or COLUMBUS, OHIO, AssrsrNons 'ro THE BUCKENE YSTEEL CASTINGS COMPANY, or COLUMBUS, OHIO.

BRAKE ARRANGEMENT FOR `Sitl-VVHEEL TRUCKS.

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. Specification of Letters Patent.

PatentedJuly 3, 1917.

Application filed Ap41'121, 1916. i Serial No. 92,638. V

To all `'1o/wm t may comer/a.'

Be it known that we, JOHN (l'lVi-trrmoen and Gnome. T.` JOHNSON, citizens of the United States andresidents of Columbus, in

the county of Franlilinfand State of Ohio,V

Our invention "rela-tes to in'iprovements in brake arrangement fi'or six*A wheel truclrsythe object being to providea construction that Will be comparatively simple, and which will equalize the brake pressure on all wheels at the same time.

Our invention consists in the parts and combination Otparts as Will he more fully described and pointed out in the4 claims.

In the accompanying"drawings. Figure 1 is a view in plan g- Fig.` 21s a View in side elevation and Fig. 3 a view in section On the line 3-3 ot' F igrsl, all of one form 'of brake mechanism; Figs.` l and 5 are views in plan and side elevation of another form;y Fig. 6 is avieiv in. side elevation of anothermodiication and F 7 Jand 8 are views in plan and side elevation respectively of the arrangement shown in Fig. 6 with the levers arranged in pairs.

Referring to the drawings in which like parts aregiven the same reference number wherever they occur, S representing the main bolster and extending lengthwise o1:y

the truck is mounted at its ends on seats formed in or on the auxiliary holsters 9 and 10. These latter holsters extend transversely7 o1 the truck, one being located in a plane between the axle 15 and the middle axle 12', and the other between the middle axle 12 and the axle 16.

The brake beams 17 are supported from the truck side frames and the brake shoes 18 are keyed to the brake beams in the usual manner. A

ln Figs. 1 2 and 3 each brake beam 17 is shown actuated'by two vertical levers which project toA points above the top ofthe transverse holsters and thus all connections between the levers and the chains or rods from the brake actuating mechanism, Will be at Opposite sides of the main holster and in a plane above the auxiliary holsters, leaving all of `said parts readily accessible and clear of other truck parts.l

The four levers 19 at opposite sides of auxiliary bolster 9, are arranged in pairs as rshoivn in Fig. 17 and each pair is connected at their lower ends by the Compression member 20, and atpoints intermediate their ends tO the brake beams 17.

The remaining tWo levers 19 are located vinternfiediate the auxiliary bolster 10 and middle axle 12and are connected at their lower endsjto,thebrakebeam 17 by the Compression 'members'25,'as shown in Fig. 2, or

Vif preferrech'may he connected to the lower ends oi' levers, 26shown 1n Figs. 6., 7 and 8,- the said leversr being connected to the Vbralre beam.

The upper ends? of the said Vlevers. 19are connected hy the tension mem- 'bers 241e with the intermediate floating levers 19.

With this constructionit will be seen that vvhen a pulling stress is exerted on the upper ends of the two levers at the outer side of holster 9, the brake shoes of all three brake beams Will be forced into contact with their respective Wheels, and the entire equip` ment being flexible, the brake pressure on all the Wheels will he the sameby properly proportioning the various levers.

' In the construction shown in Figs. a and 5 we have shown single levers 19a Connected to the longitudinal center of brake beams 17, and disposed diagonally so that their upper ends are above and to one side of the main bolster Sb which in this instance is shownv Wider at its center than the main bolster in Fig. 1. f

le have shown looped guides 21th for guiding and steadying the levers,- and tension member 241@ connecting lever 19a is at one side ot main bolster 8b.

In the construction shown in Fig. 6 the compression member 25 is connected to the lever 26 instead of to the brake beam as in Fig. 5. Thislever 26 is provided with an oblong slot 26 through Which a pin on bracket 26h passes, so as to permit of a Slight rise and fall of the brake shoes as the latter are applied to and released vfrom braking engagement with the Wheels.

In each of the above tforms the brake mechanism is Wholly Outside of the main and above the auxiliary holsters, and is consequently readily accessible for repairs or readjustments, and with any of the arrangeyment of parts shown and described, but

Having fully f described our invention what we claim as new and desire to secure by Letters-Patent, is z- 1.. In a brake rigging for six wheel trucks, the combination of a live lever, having a pivot point between its extremities, a brake beam pivotally connected to said fulcrum point, a compression member connecting the lower end of said lever with the lower endv of a second lever, the latter having a pivot point between its extremities, a second brake beam pivotally connectedv to said ulcrum point, a tension member connecting the upper end of said lever with the upper end of a third lever, the latter being ulcrumed at a point between its extremities to some convenient part of the truck, and a compression member connecting the lower end of said lever with a third brake beam.

2. In a brake rigging for six wheel trucks, the combination of a pair of vertically disposed live levers,'one on each side of the truck, each lever having a pivot point between its extremities, a brake beam connected to each lever at fulcrum points between the extremities of same, compression members connecting the lower ends of said levers withV the' lower ends of a second pair of vertical levers, each lever having a pivot point between its extremities, a second brake beam connected to each lever at fulcrum points between the'extremities of same, tension members connecting the upper ends of said levers with the upper ends of a third pair of Avertical levers, each of the latter being ulcrumed at points between their extremities to some convenient part of the truck, and compression members connecting the lower ends of said levers ywith a third beam.

3. In a brake rigging `for six wheeltrucks,

the combination of a live lever having a pivot point between its extremities, a brake beam pivotally connected to said pivot point, a compression member connecting the lower end of said leverk with the lower end of a second lever, the latter having a pivot pivot point loosely mounted for pivotal and vertical movement of the levers.

4. In a brake rigging for six wheel trucks, the combination of a pair of vertically disposed live levers, one on veach side of the truck, each rlever having'a pivot point betweenv its extremities, a brake beam con'- nected to each lever at fulcrum points bctween'the extremities of same, compression members connecting the lower ends of said levers with the lower ends of a second pair of vertical levers, each lever having apivot point between its extremities, a second brake beam connected to eachv lever at ulcrum points between the extremities of same, tension -members connecting the upper ends of said levers with the upper ends of a third pair of vertical levers, yeach of the latter being fulcrumed at points between their extremities to some convenient part of the truck, compression members connecting the lower end of said levers with the lower end of a fourth pair of vertical levers, the latter having pivot points between their extremities-to which a third brake beam is connected and mounted at their upper end for pivotal and vertical movement.

In testimony7 whereof, we have signed this specification in the presence of two sub'- scribing witnesses.

JOI-IN C. WHITRIDGE. GEORGE T. JOHNSON. Witnesses:

GEORGE MATTI-IEW MURPHY, Grenen Fmsnn KRAUss.

Copies of this patent may be obtained for ve cents each, Vby addressing the Commissioner of Patents, Washington, D. C. 

